/*
    版心居中
*/
.wrapper {
    margin: 0 auto;
    width: 1200px;
}

/*
    body背景色
*/
body {
    background-color: #f3f5f7;
}

/*
    网页头区域
*/
.header {
    height: 100px;
    background-color: #ffffff;
}

.header .wrapper {
    padding-top: 29px;
    margin-bottom: 30px;
    display: flex;
}

.logo a {
    display: block;
    width: 195px;
    height: 41px;
    background-image: url('../images/logo.png');
    font-size: 0;
}

.header .nva ul {
    display: flex;
    justify-content: space-evenly;
    width: 244px;
    height: 35px;
}

.header .nva li {
    padding-left: 8px;
    padding-right: 8px;
    height: 35px;
    line-height: 35px;
}

.header .nva {
    margin-left: 102px;
    font-size: 19px;
    color: #333;
}

.header .nva li:hover {
    border-bottom: 2px solid #00a4ff;
}

.header .search {
    margin-left: 96px;
    width: 412px;
    height: 40px;
    background-color: #f3f5f7;
    border-radius: 20px;
    padding-left: 19px;
    display: flex;
    justify-content: space-between;
}

.header .search a {
    display: inline-block;
    width: 16px;
    height: 16px;

    align-self: center;
    margin-right: 12px;
    background-image: url("../images/search.png");
}

.header .search input {
    flex: 1;
    border: 0;
    /* 去掉表单控件的焦点框 */
    outline: none;
    background-color: transparent;
}

/* ::placeholder 就是 placeholder 属性文字样式*/
.header .search input::placeholder {
    font-size: 14px;
    color: #999;
}

.header .user {
    width: 117px;
    height: 30px;
    display: flex;
    margin-left: 32px;
}

.header .user img {
    width: 30px;
    height: 30px;
}

.header .user span {
    line-height: 30px;
    margin-left: 7px;
    color: #666;
    font-size: 16px;
}

/*
    大banner宣传图
*/
.banner {
    height: 420px;
    background-image: url(../uploads/banner.png);
    background-size: 100% 100%;
}

.banner .wrapper {
    height: 420px;
    display: flex;
    justify-content: space-between;
}

.banner .wrapper .left li {
    width: 191px;
    height: 46px;
    background-color: #005576;
}

.banner .wrapper .left li:nth-child(9) {
    height: 52px;
}

.banner .wrapper .left li a {
    display: block;
    padding-left: 20px;
    line-height: 46px;
    color: #fff;
    font-size: 16px;
    background-image: url(../images/right.png);
    background-position: 91% center;
    background-repeat: no-repeat;
    padding-right: 20px;
}

.banner .wrapper .left li a:hover {
    background-image: url(../images/right-hover.png);
    color: #00a4ff;
}

.banner .wrapper .right {
    width: 218px;
    margin-top: 60px;
    margin-bottom: 54px;
    background-color: #209dd5;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.banner .wrapper .right h3 {
    margin-top: 18px;
    margin-left: 14px;
    font-size: 15px;
    color: #feffff;
    font-weight: 400;
}


.banner .wrapper .right .content {
    width: 218px;
    height: 257px;
    background-color: #ffffff;
    border-radius: 10px;
}

.banner .wrapper .right .content .desc {
    margin-top: 14px;
    margin-left: 14px;
}

.banner .wrapper .right .content .desc dl {
    width: 190px;
    height: 61px;
}

.banner .wrapper .right .content .desc dl dt {
    font-weight: 700;
    font-size: 14px;
    color: #333;
}


.banner .wrapper .right .content .desc dl dd .span1 {
    font-size: 12px;
    color: #00a4ff;
}

.banner .wrapper .right .content .desc dl dd .span2 {
    font-size: 12px;
    color: #7d7d7d;
    font-weight: 400;
}

.banner .wrapper .right .content .btn {
    display: block;
    margin-top: 14px;
    margin-left: 14px;
    width: 190px;
    height: 32px;
    text-align: center;
    line-height: 32px;
    border-radius: 16px;
    background-color: #00a4ff;
    font-size: 14px;
    color: #fff;
}

/*
    精品推荐-区域布局
*/
.recommend {
    margin-top: 11px;
    background-color: #ffffff;
    height: 60px;
    display: flex;
    align-items: center;
    box-shadow: 1px 1px 3px 0 rgba(0, 0, 0, 0.5);
}

.recommend h3 {
    color: #00a4ff;
    font-weight: 400;
    width: 72px;
    height: 25px;
    margin-left: 20px;
}

.recommend ul {
    display: flex;
}

.recommend ul li {
    display: inline-block;
    width: 84px;
    text-align: center;
    border-left: 1px solid #e0e0e0;
}

.recommend ul li:nth-child(1) {
    border-left: 0;
}

.recommend .modify {
    margin-left: auto;
    padding-right: 20px;
    justify-content: flex-end;
    font-size: 16px;
    color: #00a4ff
}

/*
    精品推荐课程
*/
.course {
    margin-top: 31px;
    height: 601px;
}

.course .hd {
    display: flex;
    justify-content: space-between;
}

.course .hd h3 {
    font-size: 21px;

    color: #333;
}

.course .hd a {
    width: 76px;
    height: 20px;
    font-size: 13px;
    color: #999999;
    background-image: url(../images/more.png);
    background-position: right center;
    background-repeat: no-repeat;
    margin-top: 5px;
}

.course .bd {
    margin-top: 15px;
    height: 556px;
}

.course .bd ul {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.course .bd li {
    background-color: #f9fafb;
    width: 228px;
    height: 271px;

}

.course .bd li:nth-child(n+6) {
    margin-top: 14px;
}

.course .bd li a .text {
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    height: 115px;
    padding-left: 20px;
}

.course .bd li a .text h4 {
    font-size: 14px;
    color: #333333;
    font-weight: 400;
}

.course .bd li a .text p {
    font-size: 14px;
    color: #999999;
}

.course .bd li a .text p span {
    font-size: 14px;
    color: #fa6400;
}

.course .bd li a .text p i {
    font-style: normal;
}

/*
    版权
*/
.footer {
    height: 273px;
    margin-top: 60px;
    background-color: #ffffff;
}

.footer .wrapper {
    display: flex;
    justify-content: space-between;
    padding-top: 60px;
}

.footer .wrapper .left {
    width: 432px;
    height: 148px;
}

.footer .wrapper .right {
    width: 516px;
    height: 151px;
}

.footer .wrapper .left p {
    margin-top: 24px;
    color: #666666;
    font-size: 12px;
}

.footer .wrapper .left .download {
    width: 120px;
    height: 36px;
    border: solid 2px #00a4ff;
    display: inline-block;
    margin-top: 14px;
    text-align: center;
    line-height: 32px;
    color: #00a4ff;
}

.footer .right {
    display: flex;
    justify-content: space-between;
}

.footer .wrapper .right dl {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.footer .wrapper .right dt {
    color: #333333;
    font-size: 16px;
    margin-bottom: 12px;
}

.footer .wrapper .right a {
    color: #666666;
    font-size: 14px;
}